LTE外辐射源雷达帧间模糊带分析与抑制

王本静 易建新 万显荣 但阳鹏

王本静, 易建新, 万显荣, 但阳鹏. LTE外辐射源雷达帧间模糊带分析与抑制[J]. 雷达学报, 2018, 7(4): 514-522. doi: 10.12000/JR18025
引用本文: 王本静, 易建新, 万显荣, 但阳鹏. LTE外辐射源雷达帧间模糊带分析与抑制[J]. 雷达学报, 2018, 7(4): 514-522. doi: 10.12000/JR18025
Wang Benjing, Yi Jianxin, Wan Xianrong, Dan Yangpeng. Inter-frame Ambiguity Analysis and Suppression of LTE Signal for Passive Radar[J]. Journal of Radars, 2018, 7(4): 514-522. doi: 10.12000/JR18025
Citation: Wang Benjing, Yi Jianxin, Wan Xianrong, Dan Yangpeng. Inter-frame Ambiguity Analysis and Suppression of LTE Signal for Passive Radar[J]. Journal of Radars, 2018, 7(4): 514-522. doi: 10.12000/JR18025

LTE外辐射源雷达帧间模糊带分析与抑制

doi: 10.12000/JR18025
基金项目: 国家重点研发计划(2016YFB0502403),博士后创新人才支持计划(BX201600117),国家自然科学基金(61701350,61331012),湖北省科技支撑项目(2015BCE075),湖北省自然科学基金(2016CFA061)
详细信息
    作者简介:

    王本静(1991–),女,河南信阳人,武汉大学电子信息学院在读硕士研究生,主要研究方向为外辐射源雷达信号处理。E-mail: benjingw@whu.edu.cn

    易建新(1989–),男,湖南永州人,武汉大学博士,研究方向为外辐射源雷达信号处理、目标跟踪和信息融合。E-mail: jxyi@whu.edu.cn

    万显荣(1975–),男,湖北天门人,武汉大学博士,教授,博士生导师,研究方向为新体制雷达设计,如外辐射源雷达、高频雷达系统及信号处理。E-mail: xrwan@whu.edu.cn

    但阳鹏(1993–),男,湖北仙桃人,武汉大学电子信息学院在读博士研究生,研究方向为外辐射源雷达信号处理。E-mail: ypd@whu.edu.cn

    通讯作者:

    易建新  jxyi@whu.edu.cn

Inter-frame Ambiguity Analysis and Suppression of LTE Signal for Passive Radar

Funds: National Key Research and Development Program (2016YFB0502403), Postdoctoral Innovative Talent Support Program (BX201600117), The National Natural Science Foundation of China (61701350, 61331012), Science and Technology Support Project of Hubei Province (2015BCE075), The Natural Science Foundation of Hubei Province (2016CFA061)
  • 摘要: LTE (Long Term Evolution)信号具有大带宽、高覆盖率、强通用性等优点,是一种新型的外辐射源雷达机会照射源。该文从FDD-LTE (Frequency Division Duplexing Long Term Evolution)信号结构入手,探讨了该信号作为第三方机会照射源的模糊函数特性;根据实测FDD-LTE信号,阐述了模糊函数中帧间模糊带抑制的必要性,并对该帧间模糊带的形成机理进行了详细的分析,分析结果表明LTE信号结构中的确定性特征既是引起模糊带的主要因素,同时也是信号相干积累的主要能量来源。对此,该文提出了基于OFDM (Orthogonal Frequency Division Multiplexing)符号子载波系数归一化的帧间模糊带抑制方法,该方法能够在抑制帧间模糊带的同时,又不影响信号相干积累进行目标探测。仿真和实测结果验证了该抑制方法的有效性,为LTE外辐射源雷达目标探测奠定了基础。

     

  • 图  1  FDD-LTE信号帧结构

    Figure  1.  FDD-LTE signal frame structure

    图  2  FDD-LTE下行资源栅格

    Figure  2.  FDD-LTE downlink resource grid

    图  3  实测FDD-LTE下行信号时频资源图

    Figure  3.  Time-frequency resource map of the measured FDD-LTE downlink signal

    图  4  实测FDD-LTE信号模糊函数

    Figure  4.  AF of the measured FDD-LTE signal

    图  5  FDD-LTE信号帧间模糊抑制前后的模糊函数

    Figure  5.  AF of the FDD-LTE signal before and after suppressing the inter-frame ambiguity

    图  6  仿真FDD-LTE信号帧间模糊抑制前后RD谱

    Figure  6.  RD spectra of the FDD-LTE simulated signal before and after suppressing the inter-frame ambiguity

    表  1  FDD-LTE信号模糊函数典型副峰

    Table  1.   Typical ambiguity peaks in the AF of the FDD-LTE signal

    副峰位置 产生原因
    帧内模糊 66.67 μs 循环前缀
    11.11 μs整数倍 CRS
    1 kHz整数倍 控制区域信号
    2 kHz整数倍 CRS
    帧间模糊 10 ms CRS及同步信号
    下载: 导出CSV

    表  2  下行物理信道及物理信号的调制方式

    Table  2.   Modulation modes of the downlink physical channels and physical signal

    物理信道及物理信号 调制方式
    CRS QPSK
    PCFICH QPSK
    PHICH BPSK
    PDCCH QPSK
    下载: 导出CSV

    表  3  FDD-LTE信号仿真参数

    Table  3.   Parameters used for the simulated FDD-LTE signal

    参数 数值
    采样率 23.04 MHz
    带宽 15 MHz
    子载波间隔 15 kHz
    OFDM符号数据体长度 66.67 μs
    循环前缀长度 4.69/5.12 μs
    无线帧数 50
    信噪比 25 dB
    PCI 0
    控制格式指示信息CFI 1
    PHICH组内用户数量 3
    下载: 导出CSV

    表  4  多径和目标仿真参数

    Table  4.   Parameters used for the simulated the multipath and target

    多径杂波 目标
    距离元 [0, 1, 2, 5, 9] 30
    多普勒频率(Hz) [0, 0, 0, 0, 0] 100
    信噪比(dB) [25, 20, 15, 10, 5] –20
    下载: 导出CSV
  • [1] 万显荣. 基于低频段数字广播电视信号的外辐射源雷达发展现状与趋势[J]. 雷达学报, 2012, 1(2): 109–123. DOI: 10.3724/SP.J.1300.2012.20027

    Wan Xian-rong. An overview on development of passive radar based on the low frequency band digital broadcasting and TV signals[J]. Journal of Radars, 2012, 1(2): 109–123. DOI: 10.3724/SP.J.1300.2012.20027
    [2] Poullin D. Passive detection using digital broadcasters (DAB, DVB) with COFDM modulation[J]. IEE Proceedings - Radar,Sonar and Navigation, 2005, 152(3): 143–152. DOI: 10.1049/ip-rsn:20045017
    [3] Tao R, Gao Z W, and Wang Y. Side peaks interference suppression in DVB-T based passive radar[J]. IEEE Transactions on Aerospace and Electronic Systems, 2012, 48(4): 3610–3619. DOI: 10.1109/TAES.2012.6324746
    [4] 金威, 吕晓德, 向茂生. 基于DVB-S信号的外辐射源雷达的模糊函数及分辨特性分析[J]. 雷达学报, 2012, 1(4): 380–386. DOI: 10.3724/SP.J.1300.2012.20077

    Jin Wei, Lü Xiao-de, and Xiang Mao-sheng. Ambiguity function and resolution characteristic analysis of DVB-S signal for passive radar[J]. Journal of Radars, 2012, 1(4): 380–386. DOI: 10.3724/SP.J.1300.2012.20077
    [5] Wan X R, Yi J X, Zhao Z X, et al. Experimental research for CMMB-based passive radar under a multipath environment[J]. IEEE Transactions on Aerospace and Electronic Systems, 2014, 50(1): 70–85. DOI: 10.1109/TAES.2013.120737
    [6] 万显荣, 唐慧, 王俊芳, 等. DTMB外辐射源雷达参考信号纯度对探测性能的影响分析[J]. 系统工程与电子技术, 2013, 35(4): 725–729. DOI: 10.3969/j.issn.1001-506X.2013.04.08

    Wan Xian-rong, Tang Hui, Wang Jun-fang, et al. Influence of reference signal purity on target detection performance in DTMB-based passive radar[J]. Systems Engineering and Electronics, 2013, 35(4): 725–729. DOI: 10.3969/j.issn.1001-506X.2013.04.08
    [7] Ma H, Antoniou M, Pastina D, et al. Maritime moving target indication using passive GNSS-based bistatic radar[J]. IEEE Transactions on Aerospace and Electronic Systems, 2018, 54(1): 115–130. DOI: 10.1109/TAES.2017.2739900
    [8] 陈刚, 王俊, 王珏, 等. GSM信号外辐射源雷达同频干扰抑制方法[J]. 西安电子科技大学学报(自然科学版), 2017, 44(6): 37–42. DOI: 10.3969/j.issn.1001-2400.2017.06.007

    Chen Gang, Wang Jun, Wang Yu, et al. Method of co-channel interference cancellation for the GSM based PBR[J]. Journal of Xidian University(Natural Science), 2017, 44(6): 37–42. DOI: 10.3969/j.issn.1001-2400.2017.06.007
    [9] Wang Q, Hou C P, and Lu Y L. An experimental study of WiMAX-based passive radar[J]. IEEE Transactions on Microwave Theory and Techniques, 2010, 58(12): 3502–3510. DOI: 10.1109/TMTT.2010.2080630
    [10] 饶云华, 朱逢园, 张修志, 等. WiFi外辐射源雷达信号模糊函数及副峰抑制分析[J]. 雷达学报, 2012, 1(3): 225–231. DOI: 10.3724/SP.J.1300.2012.20061

    Rao Yun-hua, Zhu Feng-yuan, Zhang Xiu-zhi, et al. Ambiguity function analysis and side peaks suppression of WiFi signal for passive radar[J]. Journal of Radars, 2012, 1(3): 225–231. DOI: 10.3724/SP.J.1300.2012.20061
    [11] 汪清, 侯春萍, Lu Yi-long. 基于移动WiMAX的被动雷达信号分析及模糊函数性质研究[J]. 计算机应用研究, 2010, 27(6): 2226–2228, 2231. DOI: 10.3969/j.issn.1001-3695.2010.06.065

    Wang Qing, Hou Chun-ping, and Lu Yi-long. Signal structure and ambiguity function features of mobile WiMAX based passive radar[J]. Application Research of Computers, 2010, 27(6): 2226–2228, 2231. DOI: 10.3969/j.issn.1001-3695.2010.06.065
    [12] Evers A and Jackson J A. Cross-ambiguity characterization of communication waveform features for passive radar[J]. IEEE Transactions on Aerospace and Electronic Systems, 2015, 51(4): 3440–3455. DOI: 10.1109/TAES.2015.140622
    [13] Evers A and Jackson J A. Analysis of an LTE waveform for radar applications[C]. Proceedings of 2014 IEEE Radar Conference, Cincinnati, OH, USA, 2014: 200–205
    [14] Salah A A, Abdullah R S A R, Ismail A, et al.. Feasibility study of LTE signal as a new illuminators of opportunity for passive radar applications[C]. Proceedings of 2013 IEEE International RF and Microwave Conference, Penang, Malaysia, 2016: 258–262. DOI: 10.1109/RFM.2013.6757261
    [15] Abdullah R S A R, Salah A A, Ismail A, et al. Experimental investigation on target detection and tracking in passive radar using long-term evolution signal[J]. IET Radar,Sonar&Navigation, 2016, 10(3): 577–585. DOI: 10.1049/iet-rsn.2015.0346
    [16] Salah A A, Abdullah R S A R, Ismail A, et al. Experimental study of LTE signals as illuminators of opportunity for passive bistatic radar applications[J]. Electronics Letters, 2014, 50(7): 545–547. DOI: 10.1049/el.2014.0237
    [17] 黄威振. 基于4G基站信号的被动雷达相关技术研究[D]. [硕士论文], 电子科技大学, 2016: 27–29

    Huang Wei-zhen. Research on passive radar related technique based on 4G base station signal[D]. [Master dissertation], University of Electronic Science and Technology of China, 2016: 27–29
    [18] Wang Q, Huang S, Yang J Y, et al.. Waveform Analysis of LTE Signal for Passive Radar Application[M]//Zu Q H, Vargas-Vera M, and Hu B. Pervasive Computing and the Networked World. Cham: Springer, 2013: 632–642
    [19] 万显荣, 岑博, 程丰, 等. 基于CMMB的外辐射源雷达信号模糊函数分析与处理[J]. 电子与信息学报, 2011, 33(10): 2489–2493. DOI: 10.3742/SP.J.1146.2011.00147

    Wan X R, Cen Bo, Cheng Feng, et al. Ambiguity function analysis and processing of CMMB signal based passive radar[J]. Journal of Electronics&Information Technology, 2011, 33(10): 2489–2493. DOI: 10.3742/SP.J.1146.2011.00147
    [20] Zyren J. Overview of the 3GPP long term evolution physical layer[R]. Austen: Freescale Semiconductor, 2007
    [21] ETSI. Physical Channels and Modulation[M]. 3GPP TS 36.211 V13.2.0. Nice: ETSI
    [22] Richard M A著. 雷达信号处理基础[M]. 邢孟道, 王彤, 李真芳, 等译. 北京: 电子工业出版社, 2008: 262–279

    Richard M A. Fundamentals of Radar Signal Processing[M]. Tran. Xing Meng-dao, Wang Tong, Li Zhen-fang, et al.. Beijing: Publishing House of Electronics Industry, 2008: 262–279
    [23] Petri D. Definition and analysis of homeland security systems based on software defined passive radars[D]. [Ph.D. dissertation], University of Pisa, 2011: 41–51
    [24] Fang L, Wan X R, Fang G, et al. Passive detection using orthogonal frequency division multiplex signals of opportunity without multipath clutter cancellation[J]. IET Radar,Sonar&Navigation, 2016, 10(3): 516–524. DOI: 10.1049/iet-rsn.2015.0238
    [25] Searle S, Palmer J, Davis L, et al.. Evaluation of the ambiguity function for passive radar with OFDM transmissions[C]. Proceedings of 2014 IEEE Radar Conference, Cincinnati, OH, USA, 2014: 1040–1045. DOI: 10.1109/RADAR.2014.6875747
  • 加载中
图(6) / 表(4)
计量
  • 文章访问数:  2799
  • HTML全文浏览量:  621
  • PDF下载量:  281
  • 被引次数: 0
出版历程
  • 收稿日期:  2018-03-23
  • 修回日期:  2018-05-21
  • 网络出版日期:  2018-08-28

目录

    /

    返回文章
    返回